Flash Memory

Flash memory is a type of non-volatile memory storage. This means that it can be electrically erased and programmed at byte-level, and it retains data regardless of a power source. Flash memory ICs are used within circuits to add data storage to an application.

Flash memory is a type of EEPROM (Electronically Erasable Programmable Read-Only Memory). EEPROM ICs can erase any byte of memory, which flash memory erases chunks or blocks of memory at a time. Flash memory does have a limited life in terms of the number of write cycles and tends to be used for programmed storage that is infrequently changed.

The memory size of a flash device refers to the capacity for data storage. This is often given in Mbit or MB.

You can learn more in our comprehensive guide to flash memory.

How does flash memory work?

Flash memory ICs work by retaining small parts of electricity between its transistors, allowing information to be stored with or without power. Flash stores data even when the power is switched off. Unlike RAM which loses data when the power is switched off.

What is flash memory used for?

Flash memory ICs are used in digital cameras, smartphones, computers, solid-state drives (SSD) and video game consoles. Flash memory is also found in scientific, medical and industrial applications.

What is the difference between NOR flash and NAND flash?

NOR

  • NOR flash memory provides a faster speed as possessing random access capabilities, a good choice for mobile devices as it is suitable to store large quantities of code.
  • The erase and write function is slower than NAND.
  • Hosts a larger memory cell size than NAND.
  • Limiting scaling capabilities make bit density achievable.

NAND

  • Provides fast rewritable and erase capabilities but is a little slower than NOR within the read speed.
  • NAND flash memory is a popular choice for those needing a flash drive for digital video, data storage and music. This is because of NAND's high speed and high capacity alongside being a flash memory that is cheap as the cost per bit is generally lower.
  • Quickly re-write data, over and over again.
  • Stores a large quantity of data and commonly used for USB sticks, smartphones and cameras.

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Description Price Memory Size Interface Type Package Type Pin Count Organisation Mounting Type Cell Type Minimum Operating Supply Voltage Maximum Operating Supply Voltage Block Organisation Length Height Width Dimensions
RS Stock No. 723-8785
Mfr. Part No.SST39VF040-70-4I-NHE
BrandMicrochip
SGD2.595
Each (In a Pack of 2)
units
4Mbit Parallel PLCC 32 512K x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 11.51 x 14.05 x 2.84mm
RS Stock No. 146-0157
Mfr. Part No.SST39VF040-70-4I-NHE
BrandMicrochip
SGD2.499
Each (In a Tube of 30)
units
4Mbit Parallel PLCC 32 512K x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 11.51 x 14.05 x 2.84mm
RS Stock No. 171-1481
Mfr. Part No.S29GL128P90TFIR10
SGD5.825
Each (In a Tray of 91)
units
128Mbit CFI, Parallel TSOP 56 8M x 16 bit Surface Mount NOR 3 V 3.6 V - - - - 18.5 x 14.1 x 1.05mm
RS Stock No. 723-8772
Mfr. Part No.SST39VF040-70-4C-NHE
BrandMicrochip
SGD2.50
Each (In a Pack of 2)
units
4Mbit Parallel PLCC 32 512K x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 11.51 x 14.05 x 2.84mm
RS Stock No. 912-6722
Mfr. Part No.SST39VF040-70-4C-NHE
BrandMicrochip
SGD2.405
Each (In a Tube of 30)
units
4Mbit Parallel PLCC 32 512K x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 11.51 x 14.05 x 2.84mm
RS Stock No. 125-5669
Mfr. Part No.S29GL128P90TFIR10
SGD7.44
Each
units
128Mbit CFI, Parallel TSOP 56 8M x 16 bit Surface Mount NOR 3 V 3.6 V - - - - 18.5 x 14.1 x 1.05mm
RS Stock No. 168-7915
Mfr. Part No.AT25SF041-SSHD-B
SGD0.424
Each (In a Tube of 98)
units
4Mbit SPI SOIC 8 512K x 8 Surface Mount - 2.5 V 3.6 V - - - - 5.05 x 3.99 x 1.5mm
RS Stock No. 822-8467
Mfr. Part No.AT45DB081E-SSHN-B
SGD2.552
Each (In a Pack of 5)
units
8650752bit SPI SOIC 8 4096 pages x 256 bytes Surface Mount - 1.7 V 3.6 V - - - - 5.05 x 3.99 x 1.5mm
RS Stock No. 165-6782
Mfr. Part No.AT45DB641E-MWHN-Y
SGD5.638
Each (In a Tray of 338)
units
69206016bit SPI VDFN 8 32768 pages x 256 bytes Surface Mount - 1.65 V 3.6 V - - - - 8.1 x 6.1 x 0.95mm
RS Stock No. 171-1480
Mfr. Part No.S29GL128P11TFI020
SGD6.79
Each (In a Tray of 91)
units
128Mbit CFI, Parallel TSOP 56 8M x 16 bit Surface Mount NOR 2.7 V 3.6 V - - - - 18.5 x 14.1 x 1.05mm
RS Stock No. 124-2661
Mfr. Part No.S29GL064N90BFI040
SGD7.634
Each (In a Pack of 5)
units
64Mbit CFI FPBGA 48 4M x 16 bit, 8M x 8 bit Surface Mount - 2.7 V 3.6 V - - - - 8.15 x 6.15 x 0.76mm
RS Stock No. 822-8473
Mfr. Part No.AT25SF041-SSHD-B
SGD0.466
Each (In a Pack of 10)
units
4Mbit SPI SOIC 8 512K x 8 Surface Mount - 2.5 V 3.6 V - - - - 5.05 x 3.99 x 1.5mm
RS Stock No. 165-6714
Mfr. Part No.AT45DB081E-SSHN-B
SGD2.048
Each (In a Tube of 98)
units
8650752bit SPI SOIC 8 4096 pages x 256 bytes Surface Mount - 1.7 V 3.6 V - - - - 5.05 x 3.99 x 1.5mm
RS Stock No. 177-5299
Mfr. Part No.S29GL064N90BFI040
SGD6.058
Each (In a Tray of 338)
units
64Mbit CFI FPBGA 48 4M x 16 bit, 8M x 8 bit Surface Mount - 2.7 V 3.6 V - - - - 8.15 x 6.15 x 0.76mm
RS Stock No. 177-5287
Mfr. Part No.S29GL128P90FFIR20
SGD6.111
Each (In a Tray of 180)
units
128Mbit CFI FPBGA 64 128M x 1 bit Surface Mount - 3 V 3.6 V - - - - 13 x 11 x 1mm
RS Stock No. 124-2664
Mfr. Part No.S29GL128P90FFIR20
SGD7.645
Each (In a Pack of 2)
units
128Mbit CFI FPBGA 64 128M x 1 bit Surface Mount - 3 V 3.6 V - - - - 13 x 11 x 1mm
RS Stock No. 822-8470
Mfr. Part No.AT45DB641E-MWHN-Y
SGD6.89
Each (In a Pack of 2)
units
69206016bit SPI VDFN 8 32768 pages x 256 bytes Surface Mount - 1.65 V 3.6 V - - - - 8.1 x 6.1 x 0.95mm
RS Stock No. 125-5537
Mfr. Part No.S29GL128P11TFI020
SGD7.28
Each (In a Pack of 2)
units
128Mbit CFI, Parallel TSOP 56 8M x 16 bit Surface Mount NOR 2.7 V 3.6 V - - - - 18.5 x 14.1 x 1.05mm
RS Stock No. 144-5797
Mfr. Part No.SST39VF040-70-4C-WHE
BrandMicrochip
SGD2.048
Each (In a Tray of 208)
units
4Mbit Parallel TSOP 32 512K x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 12.5 x 8.1 x 1.05mm
RS Stock No. 123-8825
Mfr. Part No.LE25U40CMDTWG
SGD0.71
Each (In a Pack of 10)
units
4Mbit SPI SOIC 8 4M x 8 bit Surface Mount - 2.3 V 3.6 V - - - - 5 x 4 x 1.5mm